Gibson's exhaust systems are designed and Dyno tuned to get the most horsepower out of your vehicle which gives style to the Dodge Durango. It is hassle free and has bolt-on installation with professional looking results. It does not require welding and is available in aluminized or stainless steel. 2.25 inch tubing, 4 inch dual wall tips and zinc plated factory style hangers, clamps and all hardware for easy bolt-on installation All welded construction, baffled and chambered for better volume efficiency with unrestricted flow; no packing to blow out or deteriorate 4 inch polished T304 stainless steel round double wall slash cut tips Exit is straight out the back Lifetime limited warranty